var b1=new Buffer(100);
console.log(b1);
console.log('byteLength 1:',Buffer.byteLength(b1));
console.log('length 1:',b1.length);

for(var i=0;i<26;i++){
    b1[i]=i+97;
}
console.log(b1.toString());
console.log('byteLength 2:',Buffer.byteLength(b1));
console.log('length 2:',b1.length);

